Semi-Implicit Steepest Descent Method for Energy Minimization and Its Application to Micromagnetic Simulation of Permanent Magnets

Author

Furuya, Atsushi ; Fujisaki, Jun ; Shimizu, Koichi ; Uehara, Yuji ; Ataka, Tadashi ; Tanaka, Tomohiro ; Oshima, Hirotaka

Author_Institution

Fujitsu Ltd., Kawasaki, Japan

Volume

51

Issue

11

fYear

2015

Firstpage

1

Lastpage

4

Abstract

We report an acceleration method for evaluating the coercivity and the M-H curve of a magnetic material based on micromagnetic simulation. To avoid stability constraint of explicit schemes, we examine a semi-implicit integration for the steepest descent method to find the local minimum state. The present method is applied to simulate a magnetization reversal process in the simplified microstructure of permanent magnets, and a major improvement of calculation speed is achieved to simulate the M-H curve of permanent magnets correctly.

Keywords

coercive force; crystal microstructure; gradient methods; magnetisation reversal; micromagnetics; permanent magnets; M-H curve; acceleration method; calculation speed; coercivity; energy minimization; explicit schemes; local minimum state; magnetization reversal process; micromagnetic simulation; permanent magnets; semi-implicit integration; semi-implicit steepest descent method; simplified microstructure; stability constraint; Coercive force; Computational modeling; Magnetization; Mathematical model; Micromagnetics; Microstructure; Permanent magnets; $M$ ??? $H$ curve; Coercivity; M-H curve; coercivity; energy minimization; micromagnetics; parallel computing; permanent magnets; semi-implicit integration; simulation;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2015.2439290

Filename

7115127